NIFI-14155 Refactored TokenParserFactory to avoid unnecessary Mapper …

…creation

nifi-extension-bundles/nifi-extension-utils/nifi-record-utils/nifi-json-record-utils/src/main/java/org/apache/nifi/json/AbstractJsonRowRecordReader.java

@@ -106,8 +106,6 @@ public abstract class AbstractJsonRowRecordReader implements RecordReader {
      * @param nestedFieldName        the name of the field to start the processing from
      * @param captureFieldPredicate  predicate that takes a JSON fieldName and fieldValue to capture top-level non-processed fields which can
      *                               be accessed by calling {@link #getCapturedFields()}
-     * @param allowComments          whether to allow comments within the JSON stream
-     * @param streamReadConstraints  configuration for the JsonFactory stream reader {@link StreamReadConstraints}
      * @param tokenParserFactory     factory to provide an instance of com.fasterxml.jackson.core.JsonParser
      * @throws IOException              in case of JSON stream processing failure
      * @throws MalformedRecordException in case of malformed JSON input
@@ -120,8 +118,6 @@ protected AbstractJsonRowRecordReader(final InputStream in,
                                           final StartingFieldStrategy strategy,
                                           final String nestedFieldName,
                                           final BiPredicate<String, String> captureFieldPredicate,
-                                          final boolean allowComments,
-                                          final StreamReadConstraints streamReadConstraints,
                                           final TokenParserFactory tokenParserFactory)
             throws IOException, MalformedRecordException {
 
@@ -137,8 +133,7 @@ protected AbstractJsonRowRecordReader(final InputStream in,
         capturedFields = new LinkedHashMap<>();
 
         try {
-            final StreamReadConstraints configuredStreamReadConstraints = streamReadConstraints == null ? DEFAULT_STREAM_READ_CONSTRAINTS : streamReadConstraints;
-            jsonParser = tokenParserFactory.getJsonParser(in, configuredStreamReadConstraints, allowComments);
+            jsonParser = tokenParserFactory.getJsonParser(in);
             jsonParser.enable(Feature.USE_FAST_DOUBLE_PARSER);
             jsonParser.enable(Feature.USE_FAST_BIG_NUMBER_PARSER);
         } catch (final JsonParseException e) {

nifi-extension-bundles/nifi-extension-utils/nifi-record-utils/nifi-json-record-utils/src/main/java/org/apache/nifi/json/JsonParserFactory.java

@@ -26,17 +26,37 @@
 import java.util.Objects;
 
 public class JsonParserFactory implements TokenParserFactory {
-    @Override
-    public JsonParser getJsonParser(final InputStream in, final StreamReadConstraints streamReadConstraints, final boolean allowComments) throws IOException {
-        Objects.requireNonNull(in, "Input Stream required");
+    private static final ObjectMapper defaultObjectMapper = new ObjectMapper();
+
+    private final JsonFactory jsonFactory;
+
+    /**
+     * JSON Parser Factory constructor using default ObjectMapper and associated configuration options
+     */
+    public JsonParserFactory() {
+        jsonFactory = defaultObjectMapper.getFactory();
+    }
+
+    /**
+     * JSON Parser Factory constructor with configurable constraints
+     *
+     * @param streamReadConstraints Stream Read Constraints
+     * @param allowComments Allow Comments during parsing
+     */
+    public JsonParserFactory(final StreamReadConstraints streamReadConstraints, final boolean allowComments) {
         Objects.requireNonNull(streamReadConstraints, "Stream Read Constraints required");
 
         final ObjectMapper objectMapper = new ObjectMapper();
-        objectMapper.getFactory().setStreamReadConstraints(streamReadConstraints);
         if (allowComments) {
             objectMapper.enable(JsonParser.Feature.ALLOW_COMMENTS);
         }
-        final JsonFactory jsonFactory = objectMapper.getFactory();
+        jsonFactory = objectMapper.getFactory();
+        jsonFactory.setStreamReadConstraints(streamReadConstraints);
+    }
+
+    @Override
+    public JsonParser getJsonParser(final InputStream in) throws IOException {
+        Objects.requireNonNull(in, "Input Stream required");
         return jsonFactory.createParser(in);
     }
 }

nifi-extension-bundles/nifi-extension-utils/nifi-record-utils/nifi-json-record-utils/src/main/java/org/apache/nifi/json/JsonPathRowRecordReader.java

@@ -68,7 +68,7 @@ public JsonPathRowRecordReader(final LinkedHashMap<String, JsonPath> jsonPaths,
                                    final boolean allowComments, final StreamReadConstraints streamReadConstraints)
                 throws MalformedRecordException, IOException {
 
-        super(in, logger, dateFormat, timeFormat, timestampFormat, null, null, null, allowComments, streamReadConstraints, new JsonParserFactory());
+        super(in, logger, dateFormat, timeFormat, timestampFormat, null, null, null, new JsonParserFactory(streamReadConstraints, allowComments));
 
         this.schema = schema;
         this.jsonPaths = jsonPaths;

nifi-extension-bundles/nifi-extension-utils/nifi-record-utils/nifi-json-record-utils/src/main/java/org/apache/nifi/json/JsonRecordSource.java

@@ -35,24 +35,25 @@ public class JsonRecordSource implements RecordSource<JsonNode> {
 
     private static final boolean ALLOW_COMMENTS_ENABLED = true;
 
+    private static final TokenParserFactory defaultTokenParserFactory = new JsonParserFactory(DEFAULT_STREAM_READ_CONSTRAINTS, ALLOW_COMMENTS_ENABLED);
+
     private final JsonParser jsonParser;
     private final StartingFieldStrategy strategy;
 
     public JsonRecordSource(final InputStream in) throws IOException {
-        this(in, null, null, DEFAULT_STREAM_READ_CONSTRAINTS);
+        this(in, null, null, defaultTokenParserFactory);
     }
 
     public JsonRecordSource(final InputStream in, StreamReadConstraints streamReadConstraints) throws IOException {
         this(in, null, null, streamReadConstraints);
     }
 
-    public JsonRecordSource(final InputStream in, final StartingFieldStrategy strategy, final String startingFieldName, StreamReadConstraints streamReadConstraints) throws IOException {
-        this(in, strategy, startingFieldName, new JsonParserFactory(), streamReadConstraints);
+    public JsonRecordSource(final InputStream in, final StartingFieldStrategy strategy, final String startingFieldName, final StreamReadConstraints streamReadConstraints) throws IOException {
+        this(in, strategy, startingFieldName, new JsonParserFactory(streamReadConstraints, ALLOW_COMMENTS_ENABLED));
     }
 
-    public JsonRecordSource(final InputStream in, final StartingFieldStrategy strategy, final String startingFieldName, TokenParserFactory tokenParserFactory,
-                            StreamReadConstraints streamReadConstraints) throws IOException {
-        jsonParser = tokenParserFactory.getJsonParser(in, streamReadConstraints, ALLOW_COMMENTS_ENABLED);
+    public JsonRecordSource(final InputStream in, final StartingFieldStrategy strategy, final String startingFieldName, final TokenParserFactory tokenParserFactory) throws IOException {
+        jsonParser = tokenParserFactory.getJsonParser(in);
         this.strategy = strategy;
 
         if (strategy == StartingFieldStrategy.NESTED_FIELD) {

nifi-extension-bundles/nifi-extension-utils/nifi-record-utils/nifi-json-record-utils/src/main/java/org/apache/nifi/json/JsonTreeRowRecordReader.java

@@ -17,7 +17,6 @@
 
 package org.apache.nifi.json;
 
-import com.fasterxml.jackson.core.StreamReadConstraints;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.node.ArrayNode;
 
@@ -53,15 +52,21 @@ public class JsonTreeRowRecordReader extends AbstractJsonRowRecordReader {
 
     private final RecordSchema schema;
 
-    public JsonTreeRowRecordReader(final InputStream in, final ComponentLog logger, final RecordSchema schema,
-                                   final String dateFormat, final String timeFormat, final String timestampFormat,
-                                   final StartingFieldStrategy startingFieldStrategy, final String startingFieldName,
-                                   final SchemaApplicationStrategy schemaApplicationStrategy, final BiPredicate<String, String> captureFieldPredicate,
-                                   final boolean allowComments, final StreamReadConstraints streamReadConstraints, final TokenParserFactory tokenParserFactory)
-            throws IOException, MalformedRecordException {
-
-        super(in, logger, dateFormat, timeFormat, timestampFormat, startingFieldStrategy, startingFieldName, captureFieldPredicate,
-                allowComments, streamReadConstraints, tokenParserFactory);
+    public JsonTreeRowRecordReader(
+            final InputStream in,
+            final ComponentLog logger,
+            final RecordSchema schema,
+            final String dateFormat,
+            final String timeFormat,
+            final String timestampFormat,
+            final StartingFieldStrategy startingFieldStrategy,
+            final String startingFieldName,
+            final SchemaApplicationStrategy schemaApplicationStrategy,
+            final BiPredicate<String, String> captureFieldPredicate,
+            final TokenParserFactory tokenParserFactory
+    ) throws IOException, MalformedRecordException {
+
+        super(in, logger, dateFormat, timeFormat, timestampFormat, startingFieldStrategy, startingFieldName, captureFieldPredicate, tokenParserFactory);
 
         if (startingFieldStrategy == StartingFieldStrategy.NESTED_FIELD && schemaApplicationStrategy == SchemaApplicationStrategy.WHOLE_JSON) {
             this.schema = getSelectedSchema(schema, startingFieldName);

nifi-extension-bundles/nifi-extension-utils/nifi-record-utils/nifi-json-record-utils/src/main/java/org/apache/nifi/json/TokenParserFactory.java

@@ -17,20 +17,17 @@
 package org.apache.nifi.json;
 
 import com.fasterxml.jackson.core.JsonParser;
-import com.fasterxml.jackson.core.StreamReadConstraints;
 
 import java.io.IOException;
 import java.io.InputStream;
 
 public interface TokenParserFactory {
     /**
-     * Get JSON Parser implementation for provided Input Stream with configured settings
+     * Get JSON Parser implementation for provided Input Stream with preconfigured settings
      *
      * @param in Input Stream to be parsed
-     * @param streamReadConstraints Stream Read Constraints applied
-     * @param allowComments Whether to allow comments when parsing
      * @return JSON Parser
      * @throws IOException Thrown on failures to read the Input Stream
      */
-    JsonParser getJsonParser(InputStream in, StreamReadConstraints streamReadConstraints, boolean allowComments) throws IOException;
+    JsonParser getJsonParser(InputStream in) throws IOException;
 }

nifi-extension-bundles/nifi-extension-utils/nifi-record-utils/nifi-yaml-record-utils/src/main/java/org/apache/nifi/yaml/YamlParserFactory.java

@@ -25,26 +25,48 @@
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.Objects;
 
 public class YamlParserFactory implements TokenParserFactory {
 
+    private static final YAMLMapper yamlMapper = new YAMLMapper();
+
+    private final YAMLFactory yamlFactory;
+
+    /**
+     * YAML Parser Factory constructor with default configuration for YAML Mapper
+     */
+    public YamlParserFactory() {
+        yamlFactory = YAMLFactory.builder().build();
+        yamlFactory.setCodec(yamlMapper);
+    }
+
+    /**
+     * YAML Parser Factory constructor with configurable parsing constraints
+     *
+     * @param streamReadConstraints Stream Read Constraints required
+     * @param allowComments Allow Comments during parsing
+     */
+    public YamlParserFactory(final StreamReadConstraints streamReadConstraints, final boolean allowComments) {
+        Objects.requireNonNull(streamReadConstraints, "Stream Read Constraints required");
+
+        final LoaderOptions loaderOptions = new LoaderOptions();
+        loaderOptions.setCodePointLimit(streamReadConstraints.getMaxStringLength());
+        loaderOptions.setProcessComments(allowComments);
+
+        yamlFactory = YAMLFactory.builder().loaderOptions(loaderOptions).build();
+        yamlFactory.setCodec(yamlMapper);
+    }
+
     /**
      * Get Parser implementation for YAML
      *
      * @param in Input Stream to be parsed
-     * @param streamReadConstraints Stream Read Constraints are not supported in YAML
-     * @param allowComments Whether to allow comments when parsing does not apply to YAML
      * @return YAML Parser
      * @throws IOException Thrown on parser creation failures
      */
     @Override
-    public JsonParser getJsonParser(final InputStream in, final StreamReadConstraints streamReadConstraints, final boolean allowComments) throws IOException {
-        final LoaderOptions loaderOptions = new LoaderOptions();
-        loaderOptions.setCodePointLimit(streamReadConstraints.getMaxStringLength());
-        final YAMLFactory yamlFactory = YAMLFactory.builder()
-                .loaderOptions(loaderOptions)
-                .build();
-
-        return yamlFactory.setCodec(new YAMLMapper()).createParser(in);
+    public JsonParser getJsonParser(final InputStream in) throws IOException {
+        return yamlFactory.createParser(in);
     }
 }

nifi-extension-bundles/nifi-extension-utils/nifi-record-utils/nifi-yaml-record-utils/src/main/java/org/apache/nifi/yaml/YamlTreeRowRecordReader.java

@@ -30,6 +30,8 @@
 
 public class YamlTreeRowRecordReader extends JsonTreeRowRecordReader {
 
+    private static final YamlParserFactory yamlParserFactory = new YamlParserFactory();
+
     public YamlTreeRowRecordReader(final InputStream in, final ComponentLog logger, final RecordSchema schema,
                                    final String dateFormat, final String timeFormat, final String timestampFormat) throws IOException, MalformedRecordException {
         this(in, logger, schema, dateFormat, timeFormat, timestampFormat, null, null, null, null);
@@ -42,6 +44,6 @@ public YamlTreeRowRecordReader(final InputStream in, final ComponentLog logger,
             throws IOException, MalformedRecordException {
 
         super(in, logger, schema, dateFormat, timeFormat, timestampFormat, startingFieldStrategy, startingFieldName, schemaApplicationStrategy,
-                captureFieldPredicate, true, null, new YamlParserFactory());
+                captureFieldPredicate, yamlParserFactory);
     }
 }

nifi-extension-bundles/nifi-py4j-extension-bundle/nifi-py4j-bridge/src/main/java/org/apache/nifi/python/processor/RecordTransformProxy.java

@@ -76,6 +76,7 @@ public class RecordTransformProxy extends PythonProcessorProxy<RecordTransform>
         .required(true)
         .build();
 
+    private static final JsonParserFactory jsonParserFactory = new JsonParserFactory();
 
     public RecordTransformProxy(final String processorType, final Supplier<PythonProcessorBridge> bridgeFactory, final boolean initialize) {
         super(processorType, bridgeFactory, initialize);
@@ -303,7 +304,7 @@ private Record createRecordFromJson(final RecordTransformResult transformResult)
 
         try (final InputStream in = new ByteArrayInputStream(jsonBytes)) {
             final JsonTreeRowRecordReader reader = new JsonTreeRowRecordReader(in, getLogger(), schema, null, null, null, null,
-                    null, null, null, false, null, new JsonParserFactory());
+                    null, null, null, jsonParserFactory);
             final Record record = reader.nextRecord(false, false);
             return record;
         }

nifi-extension-bundles/nifi-salesforce-bundle/nifi-salesforce-processors/src/main/java/org/apache/nifi/processors/salesforce/QuerySalesforceObject.java

@@ -274,6 +274,7 @@ public class QuerySalesforceObject extends AbstractProcessor {
     private static final JsonFactory JSON_FACTORY = OBJECT_MAPPER.getFactory();
     private static final String TOTAL_RECORD_COUNT_ATTRIBUTE = "total.record.count";
     private static final int MAX_RECORD_COUNT = 2000;
+    private static final JsonParserFactory jsonParserFactory = new JsonParserFactory();
 
     private volatile SalesforceToRecordSchemaConverter salesForceToRecordSchemaConverter;
     private volatile SalesforceRestClient salesforceRestService;
@@ -508,9 +509,7 @@ private JsonTreeRowRecordReader createJsonReader(InputStream querySObjectResultI
                 STARTING_FIELD_NAME,
                 SchemaApplicationStrategy.SELECTED_PART,
                 CAPTURE_PREDICATE,
-                false,
-                null,
-                new JsonParserFactory()
+                jsonParserFactory
         );
     }
 

nifi-extension-bundles/nifi-standard-bundle/nifi-standard-processors/src/test/java/org/apache/nifi/processors/standard/TestForkRecord.java

@@ -453,21 +453,23 @@ public void testExtractMode() throws InitializationException, IOException {
 
     private class JsonRecordReader extends AbstractControllerService implements RecordReaderFactory {
 
+        private static final JsonParserFactory jsonParserFactory = new JsonParserFactory();
+
         RecordSchema schema;
 
         public JsonRecordReader(RecordSchema schema) {
             this.schema = schema;
         }
 
         @Override
-        public RecordReader createRecordReader(FlowFile flowFile, InputStream in, ComponentLog logger) throws MalformedRecordException, IOException, SchemaNotFoundException {
-            return new JsonTreeRowRecordReader(in, logger, schema, dateFormat, timeFormat, timestampFormat, null, null, null, null, false, null, new JsonParserFactory());
+        public RecordReader createRecordReader(FlowFile flowFile, InputStream in, ComponentLog logger) throws MalformedRecordException, IOException {
+            return new JsonTreeRowRecordReader(in, logger, schema, dateFormat, timeFormat, timestampFormat, null, null, null, null, jsonParserFactory);
         }
 
         @Override
         public RecordReader createRecordReader(Map<String, String> variables, InputStream in, long inputLength, ComponentLog logger)
-                throws MalformedRecordException, IOException, SchemaNotFoundException {
-            return new JsonTreeRowRecordReader(in, logger, schema, dateFormat, timeFormat, timestampFormat, null, null, null, null, false, null, new JsonParserFactory());
+                throws MalformedRecordException, IOException {
+            return new JsonTreeRowRecordReader(in, logger, schema, dateFormat, timeFormat, timestampFormat, null, null, null, null, jsonParserFactory);
         }
     }